EP0479193B1 - Disc brake and brake pads for such a brake - Google Patents

Disc brake and brake pads for such a brake Download PDF

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Publication number
EP0479193B1
EP0479193B1 EP91116662A EP91116662A EP0479193B1 EP 0479193 B1 EP0479193 B1 EP 0479193B1 EP 91116662 A EP91116662 A EP 91116662A EP 91116662 A EP91116662 A EP 91116662A EP 0479193 B1 EP0479193 B1 EP 0479193B1
Authority
EP
European Patent Office
Prior art keywords
brake
spring
disc
friction lining
pads
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91116662A
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German (de)
French (fr)
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EP0479193A1 (en
Inventor
Helmut Heibel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF International UK Ltd
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Lucas Industries Ltd
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Publication date
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Publication of EP0479193A1 publication Critical patent/EP0479193A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00Parts or details
    • F16D65/02Braking members; Mounting thereof
    • F16D65/04Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • F16D65/095Pivots or supporting members therefor
    • F16D65/097Resilient means interposed between pads and supporting members or other brake parts
    • F16D65/0973Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces
    • F16D65/0974Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces acting on or in the vicinity of the pad rim in a direction substantially transverse to the brake disc axis
    • F16D65/0975Springs made from wire
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2262Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by open sliding surfaces, e.g. grooves

Definitions

  • the invention relates to a pair of brake shoes with a spring.
  • the invention also relates to a disc brake with such a pair of brake shoes.
  • DE-U-1 936 287 discloses a disc brake with a spring which is suspended between the support planes of the brake shoes and has two spring arms which project from the suspension to the brake shoes.
  • a disc brake of the type mentioned at the outset is also known from EP 0 229 618 B1.
  • a U-shaped spring is designed so that its legs protrude beyond the brake disc and the legs are bent such that the brake shoes are rotated in opposite directions on the incoming side of the brake.
  • the central base section of the U-shaped spring is not between the support planes of the brake shoes, but outside the space between the support planes.
  • the U-shaped spring of the prior art is also based on the object of avoiding rattling and metallic striking of the brake shoes in the brake.
  • Such rattling noises are unavoidable in disc brakes of the type in question, because the guides of the floating caliper each require a small amount of play.
  • Such play is typically 0.06 to 0.12 mm and cannot be reduced for economic reasons.
  • the invention has for its object to further develop the aforementioned brake shoe pair in such a way that an at least approximately the same clamping action of the spring via the brake shoes on the floating caliper is ensured with simple means even with different wear of the friction pads of the brake shoes.
  • a pin is mounted approximately centrally in the area of the upper edge of the brake shoe (in an area in which no friction lining is arranged) so that the spring with a helically wound part on the Pen can be pushed on.
  • the pin thus forms a suspension for the spring.
  • two arms protrude from the tortuous portion of the spring, one arm engaging the brake shoe to which the spring is attached, while the other arm engages over the brake disc and the brake shoe arranged on the other side of the brake disc stands.
  • two springs of the type described above are provided to amplify the tensioning of the brake shoes, one of which is mounted on one of the two brake shoes in such a way that the forces act symmetrically with respect to an axis passing through the suspensions.
  • the spring arms of a spring extend from the suspension in each case on one side of the central plane of symmetry of the brake, this plane of symmetry containing the axis of the brake.
  • the two arms of a spring preferably extend either to the inlet side or to the outlet side of the brake.
  • the invention also includes a pair of brake shoes for a disc brake described above, which has the following features according to the invention: at least one of the two brake shoes has a pin for mounting a spring, the pin protrudes on the lining side of the pad back plate of the brake shoe and at least the pad back plate of the other brake shoe a recess for receiving an arm of the spring.
  • a pin protrudes from both brake shoes on their lining back plates on the lining side and that both lining back plates each have a recess, the recesses being arranged such that they are diametrically opposite in the assembled state of the brake shoes and each have an arm a spring that can be mounted on the pin of the other pad backing plate.
  • a floating-caliper partial-pad disc brake is supported as an exemplary embodiment of the invention in relation to a brake carrier 10 fixed to the vehicle.
  • the brake carrier 10 absorbs the braking forces.
  • Brake shoes 14, 16 are arranged in a floating caliper 12, each having a pad back plate 18 and 20, respectively.
  • the saddle 12 engages over a brake disc, the position of which is indicated by the reference number 22.
  • Each of the brake shoes 14, 16 has a friction lining 24 and 26, respectively.
  • the brake is conventional.
  • a spring 28 is fastened to the lining back plate 20 of the brake shoe 16 in a manner described in more detail below.
  • the spring 28 has two spring arms 28a and 28b which protrude from a winding section 28c of the spring 28, to the right according to FIGS. 1 and 2 with respect to a central axis Ax of the brake. With a bow-shaped end portion 28a '(Fig. 2), the spring arm 28a engages over the pad back plate 20 and presses it down due to the tensioning force of the spring 28. This is indicated by the arrow A in FIG. 3A.
  • a further spring 30 is mounted on the other brake shoe 14.
  • the spring 30 also has parts which correspond to the parts of the spring 28 which are provided with corresponding letters.
  • the arms 30a and 30b of the spring 30 extend in FIGS. 1 and 2 from the suspension on the lining back plate 18 on the left side of the axis Ax.
  • Fig. 1 and Fig. 2 further show a known connection (not shown) below a vent screw 32 for pressurized hydraulic fluid and an arrangement of cylinder 34 and piston 36 for actuating the brake.
  • a vent screw 32 for pressurized hydraulic fluid
  • cylinder 34 and piston 36 for actuating the brake.
  • pressure is generated in the pressure chamber 38 of the cylinder 34 and the piston 36 moves downward in a known manner in FIG. 2, so that a carriage 40 connected to the piston 36, to which the brake shoe 16 is fastened, also moves in the direction is pressed onto the brake disc 22.
  • the floating caliper 12 moves upwards in FIGS. 1 and 2, so that the brake shoe 14 is also moved upwards and comes into engagement with the other side of the brake disk 22.
  • the springs 28, 30 are each mounted on pins 44, 45.
  • the pins are designed as pins on a screw head.
  • the screw 42 holds the lining back plate 18 or 20 on the floating caliper 12 or on the slide 40.
  • the pins 44, 45 protrude adjacent to the upper edges of the associated lining back plates, approximately in the middle thereof, in the direction parallel to the axis Ax.
  • the coiled sections 28c and 30c of the springs are pushed onto the pins, which thus form a suspension for the springs.
  • the spring arms 28a and 30a overlap with their bow-shaped sections 28a 'and 30a' in each case the associated covering back plates and press them down when installed, ie in FIG. 2 into the plane of the paper.
  • the respective other arms 28b and 30b of the springs engage recesses 46, 49 in the respective other covering back plates 20 and 18.
  • FIGS. 3A and 4 When installing the springs 28 and 30 in the brake, these are first pushed onto the associated pins 44 and 45 with the helically wound sections 28c, 30c and the spring clips 28a 'and 30a' are in the manner described via the associated lining back plates 18 and 20 pressed. Then the two springs 28, 30 are depressed approximately at the point at which the arrows of the reference numerals 28, 30 end on the springs, and latched into the associated recesses 46 and 49 in the lining back plates. The end sections 28b 'and 30b' (FIGS.
  • the spring 28 therefore causes a force on the brake shoes 16 via the spring bracket 28a ', which follows the arrow A (FIG. 3A), ie the brake shoe 16 undergoes a rotational movement in the direction of the arrow C (FIG. 3A), which overcomes the tolerance play and reliably prevents the brake shoe from rattling.
  • the arm 28b of the spring 28 engages behind the other brake shoes 14 and is tensioned upwards in FIGS. 2 and 3B, ie a force acts on the lining back plate 18, which in FIGS. 2 and 3B is perpendicular to the plane of the paper, upwards from the latter Level is out.
  • the spring 28 thus rotates the two brake shoes 14, 16 and thus also the floating caliper 12 and the slide 40 in opposite directions.
  • the brake shoe 16 When viewed in the direction of arrow P (FIG. 2), the brake shoe 16 is rotated clockwise with the slide 40, while the brake shoe 14 is rotated counterclockwise with the floating caliper 12. Both rotations take place about an axis parallel to the axis Ax, as can be seen in FIG. 3A.
  • the action of the spring 30 is analogous to that of the spring 28, only in the opposite sense, ie the springs 28 and 30 amplify their action symmetrically with respect to the axis Ax.
  • the spring end 30b 'engages behind the lining back plate 20 according to FIGS. 2 and 3A and 3B, so that an upward force B acts on the brake shoes 16 according to FIG. 3A.
  • the remaining effect of the spring 30 also results from the description of the spring 28.
  • FIG. 2 shows the support of the brake shoes 14, 16 with respect to the brake carrier 10.
  • This support corresponds to that according to EP 0 229 618 B1 already mentioned at the outset, ie guide pins 50, 52, 54, 56 are provided which are on the brake carrier 10 are attached and engage in associated guide grooves 58, 60, 62 and 64.
  • the support levels E14, E16 for the brake shoes 14 and 16 are formed, which are indicated schematically in Fig. 1.
  • the support levels are approximately at the level of the backing plates 18 and 20.
  • the suspensions formed on the pins 44 and 45 for the springs 28 and 30 lie between the support levels E14, E16 of the brake shoes 14 and 16.
  • the figures also contain a recess 66 for a lining closure warning device (not shown) and the offset ⁇ x from the center of the piston to the center of the brake lining.
  • the invention has been described above with the aid of a floating caliper partial lining disc brake. It can also be used with other brakes, especially with conventional floating and fixed caliper brakes.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Description

Die Erfindung betrifft ein Bremsbackenpaar mit einer Feder.The invention relates to a pair of brake shoes with a spring.

Ebenfalls betrifft die Erfindung eine Scheibenbremse mit einem solchen Bremsbackenpaar.The invention also relates to a disc brake with such a pair of brake shoes.

DE-U-1 936 287 offenbart eine Scheibenbremse mit einer Feder, die zwischen den Abstützebenen der Bremsbacken aufgehängt ist und zwei Federarme aufweist, die von der Aufhängung zu den Bremsbacken ragen.DE-U-1 936 287 discloses a disc brake with a spring which is suspended between the support planes of the brake shoes and has two spring arms which project from the suspension to the brake shoes.

Eine Scheibenbremse der eingangs genannten Art ist auch aus der EP 0 229 618 B1 bekannt.A disc brake of the type mentioned at the outset is also known from EP 0 229 618 B1.

Dort ist eine U-förmige Feder so ausgestaltet, daß ihre Schenkel über die Bremsscheibe ragen und die Schenkel sind derart gebogen, daß auf der einlaufenden Seite der Bremse eine Verdrehung der Bremsbacken in entgegengesetzte Richtungen erfolgt. Der mittlere Basisabschnitt der U-förmigen Feder liegt nicht zwischen den Abstützebenen der Bremsbacken, sondern außerhalb des Zwischenraumes zwischen den Abstützebenen.There, a U-shaped spring is designed so that its legs protrude beyond the brake disc and the legs are bent such that the brake shoes are rotated in opposite directions on the incoming side of the brake. The central base section of the U-shaped spring is not between the support planes of the brake shoes, but outside the space between the support planes.

In Übereinstimmung mit dem Gegenstand der vorliegenden Erfindung liegt auch der U-förmigen Feder des Standes der Technik die Aufgabe zugrunde, ein Klappern und metallisches Anschlagen der Bremsbacken in der Bremse zu vermeiden. Solche Klappergeräusche sind bei Scheibenbremsen der hier in Rede stenenden Art unvermeidbar, weil die Führungen des Schwimmsattels jeweils ein kleines Spiel benötigen. Typischerweise beträgt solches Spiel 0,06 bis 0,12 mm und läßt sich aus wirtscnaftlichen Gründen nicht verringern.In accordance with the subject matter of the present invention, the U-shaped spring of the prior art is also based on the object of avoiding rattling and metallic striking of the brake shoes in the brake. Such rattling noises are unavoidable in disc brakes of the type in question, because the guides of the floating caliper each require a small amount of play. Such play is typically 0.06 to 0.12 mm and cannot be reduced for economic reasons.

Der Erfindung liegt die Aufgabe zugrunde, das eingangs genannte Bremsbackenpaar dahingehend weiterzuentwickeln, daß mit einfachen Mitteln auch bei unterschiedlichem Verschleiß der Reibbeläge der Bremsbacken eine zumindest annährend gleiche Spannwirkung der Feder über die Bremsbacken auf den Schwimmsattel gewährleistet ist.The invention has for its object to further develop the aforementioned brake shoe pair in such a way that an at least approximately the same clamping action of the spring via the brake shoes on the floating caliper is ensured with simple means even with different wear of the friction pads of the brake shoes.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale der Anspruchs 1 gelöst.According to the invention, this object is achieved by the features of claim 1.

In einer vorteilhaften Ausgestaltung der Erfindung ist vorgesehen, daß zur Aufhängung der Feder ein Stift etwa mittig im Bereich der Oberkante des Bremsbackens montiert ist (in einem Bereich, in dem kein Reibbelag angeordnet ist), so daß die Feder mit einem wendelförmig gewundenen Teil auf den Stift aufschiebbar ist. Der Stift bildet also eine Aufhängung für die Feder.In an advantageous embodiment of the invention it is provided that a pin is mounted approximately centrally in the area of the upper edge of the brake shoe (in an area in which no friction lining is arranged) so that the spring with a helically wound part on the Pen can be pushed on. The pin thus forms a suspension for the spring.

Bevorzugt stehen von dem gewundenen Abschnitt der Feder zwei Arme ab, wobei ein Arm mit derjenigen Bremsbacke in Eingriff steht, an welcher die Feder befestigt ist, während der andere Arm über die Bremsscheibe greift und mit dem auf der anderen Seite der Bremsscheibe angeordneten Bremsbacken in Eingriff steht.Preferably, two arms protrude from the tortuous portion of the spring, one arm engaging the brake shoe to which the spring is attached, while the other arm engages over the brake disc and the brake shoe arranged on the other side of the brake disc stands.

Bevorzugt sind zur Verstärkung der die Verspannung der Bremsbacken bewirkenden Kraft zwei Federn der vorstehend beschriebenen Art vorgesehen, von denen jeweils eine an einer der beiden Bremsbacken montiert ist und zwar derart, daß die Kräfte symmetrisch in bezug auf eine durch die Aufhängungen gehende Achse wirken.Preferably, two springs of the type described above are provided to amplify the tensioning of the brake shoes, one of which is mounted on one of the two brake shoes in such a way that the forces act symmetrically with respect to an axis passing through the suspensions.

Die Federarme einer Feder erstrecken sich dabei ausgehend von der Aufhängung jeweils auf einer Seite der mittleren Symmetrieebene der Bremse, wobei diese Symmetrieebene die Achse der Bremse enthält. Mit anderen Worten: bevorzugt erstrecken sich die beiden Arme einer Feder entweder zur Einlaufseite oder zur Auslaufseite der Bremse.The spring arms of a spring extend from the suspension in each case on one side of the central plane of symmetry of the brake, this plane of symmetry containing the axis of the brake. In other words: the two arms of a spring preferably extend either to the inlet side or to the outlet side of the brake.

Die Erfindung umfaßt auch ein Bremsbackenpaar für eine vorstehend beschriebene Scheibenbremse, welches erfindungsgemäß folgende Merkmale aufweist: zumindest eine der beiden Bremsbacken weist einen Stift auf zur Montage einer Feder, der Stift steht belagseitig von der Belagrückenplatte des Bremsbackens vor und zumindest die Belagrückenplatte des anderen Bremsbackens weist eine Ausnehmung auf zur Aufnahme eines Armes der Feder.The invention also includes a pair of brake shoes for a disc brake described above, which has the following features according to the invention: at least one of the two brake shoes has a pin for mounting a spring, the pin protrudes on the lining side of the pad back plate of the brake shoe and at least the pad back plate of the other brake shoe a recess for receiving an arm of the spring.

Gemäß einer bevorzugten Ausgestaltung des Bremsbackenpaares ist vorgesehen, daß von beiden Bremsbacken an ihren Belagrückenplatten jeweils belagseitig ein Stift vorsteht und daß beide Belagrückenplatten jeweils eine Ausnehmung aufweisen, wobei die Ausnehmungen so angeordnet sind, daß sie im Montagezustand der Bremsbacken diametral gegenüber liegen und jeweils einen Arm einer Feder aufnehmen können, die auf jeweils dem Stift der anderen Belagrückenplatte montierbar ist.According to a preferred embodiment of the pair of brake shoes, it is provided that a pin protrudes from both brake shoes on their lining back plates on the lining side and that both lining back plates each have a recess, the recesses being arranged such that they are diametrically opposite in the assembled state of the brake shoes and each have an arm a spring that can be mounted on the pin of the other pad backing plate.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert. Es zeigt:

Fig. 1
eine Schwimmsattel-Teilbelag-Scheibenbremse schematisch in Draufsicht,
Fig. 2
einen Schnitt durch die Scheibenbremse gemäß Fig. 1 parallel zur Achse der Bremse;
Fig. 3A
eine Detailansicht eines Bremsbackens mit Feder in Richtung des Pfeiles P von Fig. 2;
Fig. 3B
eine Draufsicht auf Einzelheiten von Fig. 2 (entsprechend Fig. 3A), und
Fig. 4
eine Ansicht ähnlich Fig. 3A in vergrößertem Maßstab.
An exemplary embodiment of the invention is explained in more detail below with reference to the drawing. It shows:
Fig. 1
a floating caliper partial brake disc brake schematically in top view,
Fig. 2
a section through the disc brake of Figure 1 parallel to the axis of the brake.
Figure 3A
a detailed view of a brake shoe with spring in the direction of arrow P of Fig. 2;
Figure 3B
a plan view of the details of Fig. 2 (corresponding to Fig. 3A), and
Fig. 4
a view similar to FIG. 3A on an enlarged scale.

Gemäß Fig. 1 ist eine Schwimmsattel-Teilbelag-Scheibenbremse als Ausführungsbeispiel der Erfindung in bezug auf einen fahrzeugfesten Bremsträger 10 abgestützt. Der Bremsträger 10 nimmt die Bremskräfte auf. In einem Schwimmsattel 12 sind Bremsbacken 14, 16 angeordnet, die jeweils eine Belagrückenplatte 18 bzw. 20 aufweisen. Der Sattel 12 übergreift eine Bremsscheibe, deren Stellung mit dem Bezugszeichen 22 angedeutet ist.1, a floating-caliper partial-pad disc brake is supported as an exemplary embodiment of the invention in relation to a brake carrier 10 fixed to the vehicle. The brake carrier 10 absorbs the braking forces. Brake shoes 14, 16 are arranged in a floating caliper 12, each having a pad back plate 18 and 20, respectively. The saddle 12 engages over a brake disc, the position of which is indicated by the reference number 22.

Jeder der Bremsbacken 14, 16 weist jeweils einen Reibbelag 24 bzw. 26 auf. Insoweit ist die Bremse herkömmlicher Art.Each of the brake shoes 14, 16 has a friction lining 24 and 26, respectively. In this respect, the brake is conventional.

Eine Feder 28 ist in weiter unten näher beschriebener Weise an der Belagrückenplatte 20 des Bremsbackens 16 befestigt. Die Feder 28 weist zwei Federarme 28a und 28b auf, die von einem gewundenen Abschnitt 28c der Feder 28 abstehen, und zwar gemäß den Fig. 1 und 2 in bezug auf eine Mittelachse Ax der Bremse nach rechts. Mit einem bügelförmigen Endabschnitt 28a′ (Fig. 2) übergreift der Federarm 28a die Belagrückenplatte 20 und drückt diese aufgrund der Spannkraft der Feder 28 nach unten. Dies ist in Fig. 3A durch den Pfeil A angedeutet.A spring 28 is fastened to the lining back plate 20 of the brake shoe 16 in a manner described in more detail below. The spring 28 has two spring arms 28a and 28b which protrude from a winding section 28c of the spring 28, to the right according to FIGS. 1 and 2 with respect to a central axis Ax of the brake. With a bow-shaped end portion 28a '(Fig. 2), the spring arm 28a engages over the pad back plate 20 and presses it down due to the tensioning force of the spring 28. This is indicated by the arrow A in FIG. 3A.

Entsprechend der vorstehend beschriebenen Feder 28 ist eine weitere Feder 30 auf dem anderen Bremsbacken 14 montiert. Auch die Feder 30 weist Teile auf, die den mit entsprechenden Buchstaben versehenden Teilen der Feder 28 entsprechen. Die Arme 30a und 30b der Feder 30 erstrecken sich in den Fig. 1 und 2 von der Aufhängung an der Belagrückenplatte 18 ausgehend auf der linken Seite der Achse Ax.According to the spring 28 described above, a further spring 30 is mounted on the other brake shoe 14. The spring 30 also has parts which correspond to the parts of the spring 28 which are provided with corresponding letters. The arms 30a and 30b of the spring 30 extend in FIGS. 1 and 2 from the suspension on the lining back plate 18 on the left side of the axis Ax.

Fig. 1 und Fig. 2 zeigen weiter einen als solches bekannten Anschluß (nicht gezeigt) unterhalb einer Entlüftungsschraube 32 für unter Druck stehende Hydraulikflüssigkeit sowie eine Anordnung aus Zylinder 34 und Kolben 36 zum Betätigen der Bremse. Bei einer Bremsbetätigung wird Druck im Druckraum 38 des Zylinders 34 erzeugt und der Kolben 36 bewegt sich in bekannter Weise in Fig. 2 nach unten, so daß ein mit dem Kolben 36 verbundener Schlitten 40, an dem der Bremsbacken 16 befestigt ist, ebenfalls in Richtung auf die Bremsscheibe 22 gedrückt wird. Dabei bewegt sich der Schwimmsattel 12 in den Fig. 1 und 2 nach oben, so daß der Bremsbacken 14 ebenfalls nach oben bewegt wird und mit der anderen Seite der Bremsscheibe 22 in Eingriff kommt.Fig. 1 and Fig. 2 further show a known connection (not shown) below a vent screw 32 for pressurized hydraulic fluid and an arrangement of cylinder 34 and piston 36 for actuating the brake. When the brake is actuated, pressure is generated in the pressure chamber 38 of the cylinder 34 and the piston 36 moves downward in a known manner in FIG. 2, so that a carriage 40 connected to the piston 36, to which the brake shoe 16 is fastened, also moves in the direction is pressed onto the brake disc 22. The floating caliper 12 moves upwards in FIGS. 1 and 2, so that the brake shoe 14 is also moved upwards and comes into engagement with the other side of the brake disk 22.

Die Federn 28, 30 sind jeweils auf Stiften 44, 45 montiert. Die Stifte sind als Zapfen auf einem Schraubenkopf ausgebildet. Die Schraube 42 hält die Belagrückenplatte 18 bzw. 20 an dem Schwimmsattel 12 bzw. an dem Schlitten 40. Somit stehen die Stifte 44, 45 benachbart den Oberkanten der zugehörigen Belagrückenplatten, etwa in der Mitte der selben, in Richtung parallel zur Achse Ax vor. Die Federn sind mit ihren gewundenen Abschnitten 28c bzw. 30c auf die Stifte aufgeschoben, welche somit eine Aufhängung für die Federn bilden. Wie oben bereits ausgeführt ist, übergreifen die Federarme 28a und 30a mit ihren bügelförmigen Abschntiten 28a′ bzw. 30a′ jeweils die zugeordneten Belagrückenplatten und drücken diese im eingebauten Zustand nach unten, d.h. in Fig. 2 in die Papierebene hinein. Andererseits untergreifen die jeweils anderen Arme 28b und 30b der Federn Ausnehmungen 46, 49 in den jeweils anderen Belagrückenplatten 20 bzw. 18. Dies ist Fig. 3A und Fig. 4 zu entnehmen. Beim Einbau der Federn 28 und 30 in die Bremse werden diese zunächst mit den wendelförmig gewundenen Abschnitten 28c, 30c auf die zugeordneten Stifte 44 bzw. 45 aufgeschoben und die Federbügel 28a′ und 30a′ werden in der beschriebenen Weise über die zugeordneten Belagrückenplatten 18 bzw. 20 gedrückt. Sodann werden die beiden Federn 28, 30 etwa an der Stelle, an der die Pfeile der Bezugszeichen 28, 30 an den Federn enden, niedergedrückt und in die zugeordneten Ausnehmungen 46 bzw. 49 in den Belagrückenplatten eingerastet. Dabei hintergreifen die Endabschnitte 28b′ und 30b′ (Fig. 2, 3B und insbesondere 3A) eine Nase 48 an der Belagrückenplatte. Im eingebauten gespannten Zustand bewirkt deshalb die Feder 28 über den Federbügel 28a′ eine Kraft auf den Bremsbacken 16, die dem Pfeil A (Fig. 3A) folgt, d.h. der Bremsbacken 16 erfährt eine Drehbewegung in Richtung des Pfeiles C (Fig.3A), welche das Toleranzspiel überwindet und ein Klappern des Bremsbackens zuverlässig verhindert. Weiterhin hintergreift der Arm 28b der Feder 28 den anderen Bremsbacken 14 und ist in den Fig. 2 und 3B nach oben gespannt, d.h. auf die Belagrückenplatte 18 wirkt eine Kraft, die in den Fig. 2 und 3B senkrecht zur Papierebene, nach oben aus dieser Ebene herausgerichtet ist.The springs 28, 30 are each mounted on pins 44, 45. The pins are designed as pins on a screw head. The screw 42 holds the lining back plate 18 or 20 on the floating caliper 12 or on the slide 40. Thus, the pins 44, 45 protrude adjacent to the upper edges of the associated lining back plates, approximately in the middle thereof, in the direction parallel to the axis Ax. The coiled sections 28c and 30c of the springs are pushed onto the pins, which thus form a suspension for the springs. As already stated above, the spring arms 28a and 30a overlap with their bow-shaped sections 28a 'and 30a' in each case the associated covering back plates and press them down when installed, ie in FIG. 2 into the plane of the paper. On the other hand, the respective other arms 28b and 30b of the springs engage recesses 46, 49 in the respective other covering back plates 20 and 18. This can be seen in FIGS. 3A and 4. When installing the springs 28 and 30 in the brake, these are first pushed onto the associated pins 44 and 45 with the helically wound sections 28c, 30c and the spring clips 28a 'and 30a' are in the manner described via the associated lining back plates 18 and 20 pressed. Then the two springs 28, 30 are depressed approximately at the point at which the arrows of the reference numerals 28, 30 end on the springs, and latched into the associated recesses 46 and 49 in the lining back plates. The end sections 28b 'and 30b' (FIGS. 2, 3B and in particular 3A) engage behind a nose 48 on the lining back plate. In the installed tensioned state, the spring 28 therefore causes a force on the brake shoes 16 via the spring bracket 28a ', which follows the arrow A (FIG. 3A), ie the brake shoe 16 undergoes a rotational movement in the direction of the arrow C (FIG. 3A), which overcomes the tolerance play and reliably prevents the brake shoe from rattling. Furthermore, the arm 28b of the spring 28 engages behind the other brake shoes 14 and is tensioned upwards in FIGS. 2 and 3B, ie a force acts on the lining back plate 18, which in FIGS. 2 and 3B is perpendicular to the plane of the paper, upwards from the latter Level is out.

Somit verdreht die Feder 28 die beiden Bremsbacken 14, 16 und somit auch den Schwimmsattel 12 und den Schlitten 40 gegensinnig. In Richtung des Pfeiles P (Fig. 2) betrachtet, wird der Bremsbacken 16 mit dem Schlitten 40 im Uhrzeigersinn verdreht, während der Bremsbacken 14 mit dem Schwimmsattel 12 gegen den Uhrzeigersinn verdreht wird. Beide Verdrehungen erfolgen um eine zur Achse Ax parallele Achse, wie Fig. 3A zu entnehmen ist. Die Wirkung der Feder 30 ist analog derjenigen der Feder 28, nur in jeweils umgekehrten Sinn, d.h. die Federn 28 und 30 verstärken ihre Wirkung symmetrisch in bezug auf die Achse Ax. Das Federende 30b' hintergreift gemäß Fig. 2 und 3A sowie 3B die Belagrückenplatte 20, so daß gemäß Fig. 3A eine aufwärts gerichtete Kraft B auf den Bremsbacken 16 wirkt. Auch die übrige Wirkung der Feder 30 ergibt sich aus der Beschreibung der Feder 28.The spring 28 thus rotates the two brake shoes 14, 16 and thus also the floating caliper 12 and the slide 40 in opposite directions. When viewed in the direction of arrow P (FIG. 2), the brake shoe 16 is rotated clockwise with the slide 40, while the brake shoe 14 is rotated counterclockwise with the floating caliper 12. Both rotations take place about an axis parallel to the axis Ax, as can be seen in FIG. 3A. The action of the spring 30 is analogous to that of the spring 28, only in the opposite sense, ie the springs 28 and 30 amplify their action symmetrically with respect to the axis Ax. The spring end 30b 'engages behind the lining back plate 20 according to FIGS. 2 and 3A and 3B, so that an upward force B acts on the brake shoes 16 according to FIG. 3A. The remaining effect of the spring 30 also results from the description of the spring 28.

Durch das gegensinnige Verdrehen von Schwimmsattel 12 und Schlitten 40 werden die Spiele in den Führungen 58, 60, 62, 64 überwunden und Geräusche zuverlässig vermieden.By rotating the floating saddle 12 and the slide 40 in opposite directions, the games in the guides 58, 60, 62, 64 are overcome and noises are reliably avoided.

Durch dieses gegensinnige Verdrehen werden die Spiele ausschließlich in den zur Bremsscheibe parallelen Ebenen E₁₄ und E₁₆ überwunden; die Achse Ax der Bremse verbleibt parallel zur Achse der Bremsscheibe 22, wodurch auch die Reibflächen der Bremsbeläge exakt parallel zu den Reibflächen der Bremsscheibe verbleiben. Hierduch ist ein Positionieren (Freimachen) der Beläge in bezug auf die Bremsscheibe mit einem Spiel nahe Null möglich.Through this counter-rotation, the games are only overcome in the planes parallel to the brake disc E₁₄ and E₁₆; the axis Ax of the brake remains parallel to the axis of the brake disc 22, as a result of which the friction surfaces of the brake linings also remain exactly parallel to the friction surfaces of the brake disc. This makes it possible to position (clear) the pads with respect to the brake disc with a clearance close to zero.

Fig. 2 zeigt die Abstützung der Bremsbacken 14, 16 in bezug auf den Bremsträger 10. Diese Abstützung entspricht derjenigen gemäß der eingangs bereits genannten EP 0 229 618 B1, d.h. es sind Führungsstifte 50, 52, 54, 56 vorgesehen, die am Bremsträger 10 befestigt sind und in jeweils zugeordnete Führungsnuten 58, 60, 62 und 64 eingreifen. Auf diese Weise werden die Abstützebenen E₁₄, E₁₆ für die Bremsbacken 14 bzw. 16 gebildet, welche in Fig. 1 schematisch angedeutet sind. Die Abstützebenen liegen etwa in Höhe der Belagrückenplatten 18 bzw. 20. Somit liegen die an den Stiften 44 und 45 gebildeten Aufhängungen für die Federn 28 und 30 zwischen den Abstützebenen E₁₄, E₁₆ der Bremsbacken 14 bzw. 16. Aus der vorstehenden Beschreibung ergibt sich, daß an den Aufhängungen selbst die Federn kaum Kräfte übertragen, d.h. die Kräfte auf die Stifte 44, 45 sind sehr gering. Die Montage der Federn ist relativ einfach und in Fig. 4 angedeutet. Nachdem, wie oben beschrieben, der wendelförmige Abschnitt 30c der Feder 30 auf den Stift 45 geschoben ist und der zugehörige Federbügel 30a' über die Belagrückenplatte 18 gedrückt ist, wird der andere Federarm 30b an seinem langen, sich etwa parallel zur Achse Ax erstreckenden Teil niedergedrückt (etwa dort, wo der Pfeil des Bezugszeichens 30 endet), was in Fig. 4 oben links dargestellt ist. Danach gleitet das Federende 30b' an der Außenfläche der Nase 48 unter Wirkung der vorstehend genannten Druckkraft nach unten und rastet dann in die Ausnehmung 46 ein.2 shows the support of the brake shoes 14, 16 with respect to the brake carrier 10. This support corresponds to that according to EP 0 229 618 B1 already mentioned at the outset, ie guide pins 50, 52, 54, 56 are provided which are on the brake carrier 10 are attached and engage in associated guide grooves 58, 60, 62 and 64. In this way, the support levels E₁₄, E₁₆ for the brake shoes 14 and 16 are formed, which are indicated schematically in Fig. 1. The support levels are approximately at the level of the backing plates 18 and 20. Thus, the suspensions formed on the pins 44 and 45 for the springs 28 and 30 lie between the support levels E₁₄, E₁₆ of the brake shoes 14 and 16. From the above description, that the springs hardly transmit any forces to the suspensions themselves, ie the forces on the pins 44, 45 are very low. The assembly of the springs is relatively simple and indicated in Fig. 4. After, as described above, the helical section 30c of the spring 30 is pushed onto the pin 45 and the associated spring clip 30a 'is pressed over the pad back plate 18, the other spring arm 30b is pressed down on its long part which extends approximately parallel to the axis Ax (approximately where the arrow of reference numeral 30 ends), which is shown at the top left in FIG. 4. The spring end 30b ′ then slides downward on the outer surface of the nose 48 under the action of the abovementioned compressive force and then engages in the recess 46.

Die Figuren enthalten weiterhin noch eine Ausnehmung 66 für eine Belagverschließwarneinrichtung (nicht gezeigt) sowie den Versatz Δ x von Kolbenmitte zur Bremsbelagmitte.The figures also contain a recess 66 for a lining closure warning device (not shown) and the offset Δ x from the center of the piston to the center of the brake lining.

Vorstehend wurde die Erfindung anhand einer Schwimmsattel-Teilbelag-Scheibenbremse beschrieben. Sie läßt sich auch bei anderen Bremsen einsetzen, insbesondere bei herkömmlichen Schwimm- und Festsattelbremsen.The invention has been described above with the aid of a floating caliper partial lining disc brake. It can also be used with other brakes, especially with conventional floating and fixed caliper brakes.

Claims (8)

  1. A pair of brake pads (14, 16) for a disc brake comprising a spring (28, 30), characterized in that the spring (28, 30) is fastened to a friction lining backplate (18, 20) of a brake pad (14, 16) and has two spring arms (28a, 28b, 30a, 30b) acting on the two brake pads (14, 16) of the pair in the sense of counter-rotating them.
  2. A pair of brake pads for a disc brake, characterized by the following features:
    at least one of the two brake pads (14, 16) comprises a pin (44, 45) fastened to the brake pad and serving to mount a spring (28, 30), the pin protrudes from the friction lining backplate (18, 20) of the brake pad at the side of the friction lining, and at least the friction lining backplate of the other brake pad has a recess (46, 49) to receive an arm (28b, 30b) of the spring (28, 30).
  3. The pair of brake pads as claimed in claim 2, characterized in that both brake pads (14, 16) have a respective pin (44, 45) protruding from their friction lining backplates (18, 20) at the side of the friction lining, and that the two friction lining backplates each have a recess (46, 49) disposed such that they are located opposite each other when the brake pads are in their mounted states and that they each can take up an arm (28b, 30b) of a spring adapted to be mounted on a pin (44, 45) each of the other friction lining backplate.
  4. A disc brake comprising two brake pads (14, 16) between which a brake disc (22) is adapted to be clamped and which are supported with respect to a brake carrier member (10), further comprising at least one spring (28, 30) for counter-rotating the two brake pads about an axis (Ax) which extends substantially at right angles to the brake disc (22), characterized in that the spring (28, 30) is fastened to a friction lining backplate (18, 20) of a brake pad (14, 16) and has two spring arms (28a, 28b, 30a, 30b) acting on the two brake pads (14, 16) in the sense of counter-rotating them.
  5. The disc brake as claimed in claim 4, characterized in that the suspension (28c, 30c, 44, 45) comprises a pin (44, 45) which is fastened to a friction lining backplate (18, 20) of the brake pad (14, 16).
  6. The disc brake as claimed in claim 5, characterized in that the spring (28, 30) is wound around the pin (44, 45).
  7. The disc brake as claimed in any one of the preceding claims, characterized in that two springs (28, 30) are provided, each being fastened to the respective friction lining backplate (18, 20) so as to face the brake disc (22) and straddling the brake disc (22) by one spring arm (28b, 30b) each.
  8. The disc brake as claimed in any one of the preceding claims, characterized in that the spring arms (28a, 28b; 30a, 30b) each extend towards the same side of the brake, from the suspension.
EP91116662A 1990-10-01 1991-09-30 Disc brake and brake pads for such a brake Expired - Lifetime EP0479193B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9013699U 1990-10-01
DE9013699U DE9013699U1 (en) 1990-10-01 1990-10-01

Publications (2)

Publication Number Publication Date
EP0479193A1 EP0479193A1 (en) 1992-04-08
EP0479193B1 true EP0479193B1 (en) 1994-07-27

Family

ID=6857975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91116662A Expired - Lifetime EP0479193B1 (en) 1990-10-01 1991-09-30 Disc brake and brake pads for such a brake

Country Status (4)

Country Link
EP (1) EP0479193B1 (en)
JP (1) JPH04262131A (en)
DE (2) DE9013699U1 (en)
ES (1) ES2056550T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3129672B1 (en) 2014-04-08 2018-04-11 Freni Brembo S.p.A. Disc brake pad, spring for disc brake caliper and disk brake caliper assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1936287U (en) * 1965-11-16 1966-04-07 Jurid Werke Gmbh DISC BRAKE PARTIAL PAD.
GB1533976A (en) * 1974-12-24 1978-11-29 Girling Ltd Friction pad assemblies for sliding caliper disc brakes
EP0229618B1 (en) * 1986-01-17 1990-04-04 LUCAS INDUSTRIES public limited company Floating caliper spot-type disc brake

Also Published As

Publication number Publication date
ES2056550T3 (en) 1994-10-01
DE59102336D1 (en) 1994-09-01
JPH04262131A (en) 1992-09-17
EP0479193A1 (en) 1992-04-08
DE9013699U1 (en) 1992-02-13

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